Convert CONFIG_CMDLINE_PS_SUPPORT to Kconfig

This converts the following to Kconfig:
   CONFIG_CMDLINE_PS_SUPPORT

Signed-off-by: Tom Rini <trini@konsulko.com>

README

@@ -1532,14 +1532,6 @@ The following options need to be configured:
 		of the backslashes before semicolons and special
 		symbols.
 
-- Command Line Editing and History:
-		CONFIG_CMDLINE_PS_SUPPORT
-
-		Enable support for changing the command prompt string
-		at run-time. Only static string is supported so far.
-		The string is obtained from environment variables PS1
-		and PS2.
-
 - Default Environment:
 		CONFIG_EXTRA_ENV_SETTINGS
 

cmd/Kconfig

@@ -31,6 +31,13 @@ config CMDLINE_EDITING
 	  Enable editing and History functions for interactive command line
 	  input operations
 
+config CMDLINE_PS_SUPPORT
+	bool "Enable support for changing the command prompt string at run-time"
+	depends on HUSH_PARSER
+	help
+	  Only static string in the prompt is supported so far.  The string is
+	  obtained from environment variables PS1 and PS2.
+
 config AUTO_COMPLETE
 	bool "Enable auto complete using TAB"
 	depends on CMDLINE

configs/socfpga_vining_fpga_defconfig

@@ -27,6 +27,7 @@ CONFIG_CLOCKS=y
 CONFIG_MISC_INIT_R=y
 CONFIG_SPL_SPI_LOAD=y
 CONFIG_SYS_SPI_U_BOOT_OFFS=0x40000
+CONFIG_CMDLINE_PS_SUPPORT=y
 CONFIG_CMD_ASKENV=y
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_EEPROM=y

include/configs/socfpga_vining_fpga.h

@@ -186,9 +186,6 @@
 		"fi\0"							\
 		"socfpga_legacy_reset_compat=1\0"
 
-/* Support changing the prompt string */
-#define CONFIG_CMDLINE_PS_SUPPORT
-
 /* The rest of the configuration is shared */
 #include <configs/socfpga_common.h>